SIMULIUM. 27 



TABLE OF SPECIES. 



1. Claws with minute subbasal tooth ; thorncie pllosity golden yellow, ir- 

 regularly arranged in small groups; niesopleural hairs situated low 



down aureopunctat u III , p. 27. 



Claws simple; thoracic pilosity not arranged in groups, regularly dis- 

 posed ; mesoitleural hairs high up near to margin of scutum. 



liippovonim. p. 2S. 



T have seen very few species of Simuliidse with the additional 

 pleural hairs, but one of those I have obtained as rcptans Linnivus, 

 from Britain, another in the collection labeled S. Uneafiun Meigen, 

 variety, and also suhnigrwa Lutz, are in this category, though no one 

 who has previously described any species in the family has ever indi- 

 cated that he has noticed the presence of these hairs or scales. 



Simulium aureopunctatum, new species. 



Female. — Black, subopaque. Frons and face with whitish dust- 

 ing; antennaj brown, two basal joints yellow, palpi black. Scutum 

 unstriped, slightl}'^ whitish-dusted anteriorly, but without dis- 

 tinct white spots; prescutum and margin of scutum close to it yel- 

 lowish ; pleura? black-brown, scutellum and postscutum concolorous 

 with scutum. Abdomen black-brown, basal four segments subopaque, 

 apical four shining. Legs j^ellow, blackened as follows: Entire 

 ventral surface and apical half of dorsal surface of tibiae, and entire 

 tarsi of fore pair; coxae, femora except bases, apical halves of tibiae, 

 apex of first, apical half of second joint, and apical three joints of 

 tarsi of mid and hind pairs. Dorsal surfaces of all tibiae with dis- 

 tinct silvering. "Wings clear, slightly grayish at tip and on hind 

 margin, thick veins brown. Halteres brownish yellow, stalk darker. 



Frons divergent-sided, not one-third as wide at upper angle of 

 eyes as width of head, distinctly narrower above antenna than at 

 upper angle, surface hairs black, strong but not numerous; face 

 slightly convex, distinctly longer than broad, and slightly broader 

 than frons at upper angle, surface hairs black, on upper portion 

 short and sparse, longer on lowest fourth ; palpi black-haired, post- 

 ocular cilia brown. Scutum with yellow scale-like pilosity which ad- 

 heres closely to the surface and is arranged in irregular groups of from 

 three to seven scales of uniform length except on posterior fourth 

 where they become longer and are more upright ; besides this pilosity 

 the surface bears numerous short, upright, black hairs which are 

 most conspicuous on anterior, lateral, and posterior margins: pleural 

 tuft brown, the anterior pleural hairs golden yellow, scale-like, situ- 

 ated about midway from lower to upper margin on mesopleurae; post- 

 spiracular area haired posteriorly; scutellum with yellow scale-like 

 pilosity and several long, upright, blackish hairs on po.sterior mar- 

 gin. Basal fringe of abdomen long, yellow, surface hairs on seg- 



